Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'da97b03672ce04d2ce660e9cc1b3723e7b2eae8288ce50862ee0a103f3cbc343' 
  AND token = 'VfF85QG5p6QMbSEAmGKJrqs2SBLy/dj7BUbyjpfT/GI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00071

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}